2640404366446 has 32 divisors (see below), whose sum is σ = 4939661530368. Its totient is φ = 1028361795840.

The previous prime is 2640404366443. The next prime is 2640404366461. The reversal of 2640404366446 is 6446634040462.

It is a self number, because there is not a number n which added to its sum of digits gives 2640404366446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640404366443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2626755 + ... + 3490078.

It is an arithmetic number, because the mean of its divisors is an integer number (154364422824).

Almost surely, 2^{2640404366446} is an apocalyptic number.

2640404366446 is a deficient number, since it is larger than the sum of its proper divisors (2299257163922).

2640404366446 is a wasteful number, since it uses less digits than its factorization.

2640404366446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6119656.

The product of its (nonzero) digits is 7962624, while the sum is 49.

The spelling of 2640404366446 in words is "two trillion, six hundred forty billion, four hundred four million, three hundred sixty-six thousand, four hundred forty-six".